Eaeth auger



(No Model.)

T. SMITH.

EARTH AUGER.

$10,469,307. Patented Feb. 23, 1892.

UNITED STATES PATENT OFFICE.

THOMAS SMITH, OF BREOKIN RIDGE, MISSOURI, ASSIGNOR OF 'IWVO-THIRDS TOJOHN F. SMITH AND JAMES B. BENNETT.

EARTH-'AUGER.

SPECIFICATION forming part of Letters Patent No. 469,307, dated February23, 1892.

Application filed January 2 1891.

To all whom it may concern.-

Be it known that I, THOMAS SMITH, of Breckinridge, county of Caldwell.and State of Missouri, have invented certain new and usef ulImprovements in Earth-Angers, of which the following is a specification,reference being had to the accompanying drawings.

The object of my invention is to produce a comparatively cheap andsimple earth-auger bitthat may be readily detached from its head when itis desired to substitute one bit for another, that is very efiective inits operation, and is so constructed that it may be easily sharpened byany one.

In the accompanyingdrawings, Figure 1 is a side view of my auger; Fig.2, a view of another side, partly in section; and Fig. 3 is a bottomplan view of my invention.

Referring to the letters on the drawings, A indicates a semi-cylindricalpiece of sheet metal, preferably steel or hardened iron. This piece,which constitutes the main body portion, I will call it, of my bit, isprovided at its lower end with a blade B, which is furnished, asillustrated in the drawings, with the outwardly-curved side 0, whichforms a curved continuation of one side of the part A, and with theconcave edge D. The curved edges 0 and D are cut in the sheet metal ofthe semi-cylinder A. Its point E is drawn over to the center of thecylinder, of which the part A is a half, so that the point of my bit issimilar in location and function to the point of an ordinary wood drill.

F indicates a fender, which is scoured by any suitable means, integrallyor otherwise, to the side of the piece A, so as to form with its loweredge a continuation of the concave edge D. It is twisted so that the bitresem- This form causes the Serial No. 376,516. (No model.)

in the bit when it is drawn from the hole.

To the upper end of the piece A is secured a ring G, Within which isfastened, preferably by rivets, a tripod head that is provided,

preferably, with an internally-screw threaded orifice H, that is adaptedto receive the end of the stem J, which, when the means of uniting themare screw-threads, is externally screw-threaded, so that it may bereadily attached to or separated from the bit; at. the will of theoperator.

K indicates a handle or cross-piece inserted through an eyelet in thetop of the stem, whereby the bit may be operated, as usual. The tripodhead is not essential, but only a suitable kind of connecting-piece.

By making the piece A of sheet metal its cutting-edge may be keptsharpened by the use of a file during the life-time of the bit. If

' THOMAS SMITI I.

Witnesses:

JNo. F. SMITH, J. B. BENNETT.

